Days after California State University San Marcos announced that members of an unrecognized fraternity were being investigated for an alleged rape, a group of students held a rally on campus Tuesday to send the message that sexual assaults won’t be tolerated.

“Two four, six, eight, no more violence, no more rape,” they chanted over and over trying to encourage others to join in while marching around a plaza in front of the school’s library.

Organized by a new campus community group called Feminists Anonymous, the rally was held in reaction the university’s announcement Friday that a student had filed a report about an alleged sexual assault that took place at an off-campus party in Oceanside in May.

The university warning — issued to students, faculty, staff and parents — said members of Tau Kappa Epsilon were being investigated for an alleged rape involving date-rape drugs and the group’s social events could be dangerous.

“While all reasonable precautions are being taken by law enforcement, the university is advising students and all campus community members to consider carefully whether their presence at or near TKE social events and parties could place them in danger of sexual assault, date rape drugs, or similar illegal drug and/or alcohol use and abuse,” the statement said.

The alert was issued under the “Timely Notice” provisions of the Clery Act, a federal law that requires all colleges and universities that participate in federal financial aid programs to track and disclose information about crime on and near campuses, said university spokeswoman Margaret Chantung.

She said Oceanside police are investigating the case, but have not made an arrest.

The roughly two-dozen students rallying Tuesday — the second day of classes for the new school year — said they wanted to raise awareness among the student body and put the school on alert that it needs to do everything it can to make the campus safe.

They also encouraged any students that may have been victims to come forward.

A special hot line for students has been set up at (760) 750-7233. Reports can be made anonymously.

Karen Guzman, one of the organizers of the rally, said students want to work with the university to guarantee the safety of all students, staff, and faculty.

Among the signs being carried by students during the rally: No means no; There are no blurred lines when it comes to consent; End all violence, Take back the night; and My sisters and I did not ask for it.

University officials said they have received additional reports of sexual assaults purportedly involving members of the same fraternity said to have occurred on or near the university and at off-campus residences of members.

The statement said other alleged criminal behaviors related to the TKE fraternity include hazing, victim and witness intimidation, harassment, vandalism, providing drugs and alcohol to minors, and illegal drug use.

Tau Kappa Epsilon is not a recognized CSUSM student organization and although university officials don’t have an official roster of members they believe about 30 students are associated with the group.

On Friday, the international headquarters of TKE temporarily suspended the chapter pending an investigation, said spokesman Alex Baker.

“We learned about this today and have begun our investigation today,” Baker said.